drivers/net/bonding/bond_sysfs_slave.c

   1 /*      Sysfs attributes of bond slaves
   2  *
   3  *      Copyright (c) 2014 Scott Feldman <sfeldma@cumulusnetworks.com>
   4  *
   5  *      This program is free software; you can redistribute it and/or
   6  *      modify it under the terms of the GNU General Public License
   7  *      as published by the Free Software Foundation; either version
   8  *      2 of the License, or (at your option) any later version.
   9  */
  10
  11 #include <linux/capability.h>
  12 #include <linux/kernel.h>
  13 #include <linux/netdevice.h>
  14
  15 #include <net/bonding.h>
  16
  17 struct slave_attribute {
  18         struct attribute attr;
  19         ssize_t (*show)(struct slave *, char *);
  20 };
  21
  22 #define SLAVE_ATTR(_name, _mode, _show)                         \
  23 const struct slave_attribute slave_attr_##_name = {             \
  24         .attr = {.name = __stringify(_name),                    \
  25                  .mode = _mode },                               \
  26         .show   = _show,                                        \
  27 };
  28 #define SLAVE_ATTR_RO(_name) \
  29         SLAVE_ATTR(_name, S_IRUGO, _name##_show)
  30
  31 static ssize_t state_show(struct slave *slave, char *buf)
  32 {
  33         switch (bond_slave_state(slave)) {
  34         case BOND_STATE_ACTIVE:
  35                 return sprintf(buf, "active\n");
  36         case BOND_STATE_BACKUP:
  37                 return sprintf(buf, "backup\n");
  38         default:
  39                 return sprintf(buf, "UNKNOWN\n");
  40         }
  41 }
  42 static SLAVE_ATTR_RO(state);
  43
  44 static ssize_t mii_status_show(struct slave *slave, char *buf)
  45 {
  46         return sprintf(buf, "%s\n", bond_slave_link_status(slave->link));
  47 }
  48 static SLAVE_ATTR_RO(mii_status);
  49
  50 static ssize_t link_failure_count_show(struct slave *slave, char *buf)
  51 {
  52         return sprintf(buf, "%d\n", slave->link_failure_count);
  53 }
  54 static SLAVE_ATTR_RO(link_failure_count);
  55
  56 static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
  57 {
  58         return sprintf(buf, "%pM\n", slave->perm_hwaddr);
  59 }
  60 static SLAVE_ATTR_RO(perm_hwaddr);
  61
  62 static ssize_t queue_id_show(struct slave *slave, char *buf)
  63 {
  64         return sprintf(buf, "%d\n", slave->queue_id);
  65 }
  66 static SLAVE_ATTR_RO(queue_id);
  67
  68 static ssize_t ad_aggregator_id_show(struct slave *slave, char *buf)
  69 {
  70         const struct aggregator *agg;
  71
  72         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  73                 agg = SLAVE_AD_INFO(slave)->port.aggregator;
  74                 if (agg)
  75                         return sprintf(buf, "%d\n",
  76                                        agg->aggregator_identifier);
  77         }
  78
  79         return sprintf(buf, "N/A\n");
  80 }
  81 static SLAVE_ATTR_RO(ad_aggregator_id);
  82
  83 static ssize_t ad_actor_oper_port_state_show(struct slave *slave, char *buf)
  84 {
  85         const struct port *ad_port;
  86
  87         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  88                 ad_port = &SLAVE_AD_INFO(slave)->port;
  89                 if (ad_port->aggregator)
  90                         return sprintf(buf, "%u\n",
  91                                        ad_port->actor_oper_port_state);
  92         }
  93
  94         return sprintf(buf, "N/A\n");
  95 }
  96 static SLAVE_ATTR_RO(ad_actor_oper_port_state);
  97
  98 static ssize_t ad_partner_oper_port_state_show(struct slave *slave, char *buf)
  99 {
 100         const struct port *ad_port;
 101
 102         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
 103                 ad_port = &SLAVE_AD_INFO(slave)->port;
 104                 if (ad_port->aggregator)
 105                         return sprintf(buf, "%u\n",
 106                                        ad_port->partner_oper.port_state);
 107         }
 108
 109         return sprintf(buf, "N/A\n");
 110 }
 111 static SLAVE_ATTR_RO(ad_partner_oper_port_state);
 112
 113 static const struct slave_attribute *slave_attrs[] = {
 114         &slave_attr_state,
 115         &slave_attr_mii_status,
 116         &slave_attr_link_failure_count,
 117         &slave_attr_perm_hwaddr,
 118         &slave_attr_queue_id,
 119         &slave_attr_ad_aggregator_id,
 120         &slave_attr_ad_actor_oper_port_state,
 121         &slave_attr_ad_partner_oper_port_state,
 122         NULL
 123 };
 124
 125 #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
 126 #define to_slave(obj)   container_of(obj, struct slave, kobj)
 127
 128 static ssize_t slave_show(struct kobject *kobj,
 129                           struct attribute *attr, char *buf)
 130 {
 131         struct slave_attribute *slave_attr = to_slave_attr(attr);
 132         struct slave *slave = to_slave(kobj);
 133
 134         return slave_attr->show(slave, buf);
 135 }
 136
 137 static const struct sysfs_ops slave_sysfs_ops = {
 138         .show = slave_show,
 139 };
 140
 141 static struct kobj_type slave_ktype = {
 142 #ifdef CONFIG_SYSFS
 143         .sysfs_ops = &slave_sysfs_ops,
 144 #endif
 145 };
 146
 147 int bond_sysfs_slave_add(struct slave *slave)
 148 {
 149         const struct slave_attribute **a;
 150         int err;
 151
 152         err = kobject_init_and_add(&slave->kobj, &slave_ktype,
 153                                    &(slave->dev->dev.kobj), "bonding_slave");
 154         if (err)
 155                 return err;
 156
 157         for (a = slave_attrs; *a; ++a) {
 158                 err = sysfs_create_file(&slave->kobj, &((*a)->attr));
 159                 if (err) {
 160                         kobject_put(&slave->kobj);
 161                         return err;
 162                 }
 163         }
 164
 165         return 0;
 166 }
 167
 168 void bond_sysfs_slave_del(struct slave *slave)
 169 {
 170         const struct slave_attribute **a;
 171
 172         for (a = slave_attrs; *a; ++a)
 173                 sysfs_remove_file(&slave->kobj, &((*a)->attr));
 174
 175         kobject_put(&slave->kobj);
 176 }